package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo {
    public static void main(String[] args) {
        Collection c =new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        c.add(new Point(1,2));
        System.out.println(c);

        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含:"+contains);


        c.remove(p);
        System.out.println(c);

        Collection cc = new ArrayList();
        Point pp = new Point(1,2);
        cc.add(pp);
        System.out.println(pp);
        System.out.println(cc);

        pp.setX(200);
        System.out.println(pp);
        System.out.println(cc);























        /*Collection c1 = new ArrayList();
        c1.add("one");
        c1.add("two");
        c1.add("three");
        c1.add("four");
        c1.add("five");
        //集合重写了obje的tostring（）方法，返回格式如下：
        //【元素1.tostring（），元素2.tostring（）....]
        System.out.println(c1);
        System.out.println("size"+c1.size());
        System.out.println("是否为空集"+c1.isEmpty());

        c1.clear();
        System.out.println(c1);
        System.out.println("size"+c1.size());
        System.out.println("是否为空集"+c1.isEmpty());*/
    }
}
